Table 1.
Patients' clinical characteristic
| Factor | ENI n (%) | IFI n (%) | χ2 (*F value) | P value |
|---|---|---|---|---|
| Total | ||||
| Subgroup | 28 | 29 | ||
| Sex | ||||
| Female | 2 (3.5) | 1 (1.7) | 0.390 | 0.532 |
| Male | 26 (45.6) | 28 (49.2) | ||
| Age (y.o.) | ||||
| Range | 40-69 | 46-76 | 0.016* | 0.900 |
| Median | 58.5±8.7 | 58.7±8.6 | ||
| ECOG | ||||
| 1 | 8 (14.0) | 13 (22.8) | 3.292 | 0.193 |
| 2 | 18 (31.6) | 16 (28.1) | ||
| 3 | 2 (3.5) | 0 | ||
| Location | ||||
| Ut | 2 (3.5) | 4 (7.0%) | 0.697 | 0.706 |
| Mt | 15 (26.3) | 15 (26.3) | ||
| Lt | 11 (19.4) | 10 (17.5) | ||
| Lesion length (cm) | ||||
| Range | 3-10 | 3-7 | 1.524* | 0.222 |
| Median | 5.3±1.6 | 4.5±1.1 | ||
| Surgical procedure | ||||
| Single incision | 15 (26.3) | 13 (22.8) | 3.656 | 0.161 |
| Two incisions | 10 (17.5) | 7 (12.3) | ||
| Three incisions | 3 (5.3) | 9 (15.8) | ||
| Clinical stage | ||||
| I | 0 | 3 (5.3) | 5.130 | 0.163 |
| II | 11 (19.3) | 7 (12.3) | ||
| III | 17 (29.8) | 19 (33.3) | ||
| Lymph node dissection | ||||
| No. of positive | 2.5±2.9 | 2.3±3.7 | 0.229* | 0.634 |
| No. of total | 16.5±8.5 | 14.8±8.8 | 0.000* | 0.997 |
| RT technology | ||||
| 3D-CRT | 7 (12.3) | 10 (17.5) | 0.612 | 0.434 |
| IMRT | 21 (36.8) | 19 (33.3) | ||
| Interval between surgery to RT (mo) | ||||
| Range | 0.9-10 | 0.6-10.9 | 0.221* | 0.640 |
| Median | 3.9±1.9 | 2.7±1.9 | ||
| Pts of neoadjuvant chemo | 4 (14.3) | 6 (20.7) | ||
| No. of cycles | 1.7±0.5 | 2.3±1.9 | 1.610* | 0.240 |
| Pts of adjuvant chemo | 24 (85.7) | 22 (75.9) | ||
| No. of cycles | 3.1±1.4 | 2.4±1.0 | 4.995* | 0.031 |
| Follow-up time(mo) | ||||
| Range | 2.7-78.8 | 8.9-65.6 | 0.185* | 0.669 |
| Median | 28.5±21.7 | 34.6±19.2 | ||
Note: *F value in T test.
Abbreviations: ENI, elective lymph node irradiation; IFI, involved field irradiation; y.o., years old; mo, months; RT, radiotherapy; Pts, patients; Chemo, chemotherapy; No., numbers.